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Home › Gemstones › Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
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Untreated Gemstones Treatment

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1.45ct Pink Tourmaline, Cushion, VS
Tourmaline Product Video (743193)

1.45ct Pink Tourmaline, Cushion, VS

8 x 6 mm (calibrated)

$ 168.49

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4.79ct Brown Tiger'S Eye, Oval, Opaque

4.79ct Brown Tiger'S Eye, Oval, Opaque

12 x 10 mm (calibrated)

$ 4.77

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10.86ct Green Jadeite, Oval, Translucent

10.86ct Green Jadeite, Oval, Translucent

19.1 x 15.6 mm

$ 35.70

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21.63ctw Multicolor Fluorite, Pear Shape, Transparent
Fluorite Product Video (744502)

21.63ctw Multicolor Fluorite, Pear Shape, Transparent

23.1 x 13 mm

$ 89.76

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8.80ct Green Prehnite, Fancy, Translucent

8.80ct Green Prehnite, Fancy, Translucent

16.3 x 11.1 mm

$ 14.46

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4.18ctw Multicolor Andalusite, Round, VS
Andalusite Product Video (382239)

4.18ctw Multicolor Andalusite, Round, VS

3.5 mm (calibrated)

$ 183.77

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9.25ct White Rainbow Moonstone, Marquise, Transparent

9.25ct White Rainbow Moonstone, Marquise, Transparent

23.7 x 10.8 mm

$ 165.83

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1.90ctw Violet Amethyst, Marquise, VS

1.90ctw Violet Amethyst, Marquise, VS

10 x 5 mm (calibrated)

$ 12.62

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0.58ct Orange Sphalerite, Round, VS-SI

0.58ct Orange Sphalerite, Round, VS-SI

4.7 mm

$ 28.88

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12.95ct Yellow Cat'S Eye Apatite, Oval, Translucent
Cat's Eye Apatite Product Video (385353)

12.95ct Yellow Cat'S Eye Apatite, Oval, Translucent

17.3 x 10.4 mm

$ 283.76

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0.60ct Yellow Citrine, Pear Shape, VVS

0.60ct Yellow Citrine, Pear Shape, VVS

7 x 5 mm (calibrated)

$ 2.49

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58.37ct Violet Amethyst, Cushion, VVS-VS
Amethyst Product Video (753796)

58.37ct Violet Amethyst, Cushion, VVS-VS

27 x 20 mm (calibrated)

$ 484.47

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5.15ct Brown Smoky Quartz, Flower Cut, Transparent

5.15ct Brown Smoky Quartz, Flower Cut, Transparent

11 x 11 mm (calibrated)

$ 21.11

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8.30ctw White Topaz, Square, VS

8.30ctw White Topaz, Square, VS

5 x 5 mm (calibrated)

$ 65.95

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5.77ct Multicolor Fire Agate, Fancy, Opaque

5.77ct Multicolor Fire Agate, Fancy, Opaque

12.1 x 10.9 mm

$ 48.86

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1.23ct Pink Strawberry Quartz, Oval, Translucent

1.23ct Pink Strawberry Quartz, Oval, Translucent

7 x 5 mm (calibrated)

$ 5.59

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13.86ctw Multicolor Labradorite, Round, Translucent

13.86ctw Multicolor Labradorite, Round, Translucent

12 mm (calibrated)

$ 29.82

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15.75ctw Black Spinel, Oval, Opaque

15.75ctw Black Spinel, Oval, Opaque

14 x 10 mm (calibrated)

$ 51.78

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2.12ct Orange Zircon, Round, VS-SI

2.12ct Orange Zircon, Round, VS-SI

7 mm (calibrated)

$ 65.04

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10.81ct White Dendritic Agate, Oval, Translucent

10.81ct White Dendritic Agate, Oval, Translucent

17.4 x 12.3 mm

$ 7.54

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0.35ct Violet Iolite, Pear Shape, VS

0.35ct Violet Iolite, Pear Shape, VS

6 x 4 mm (calibrated)

$ 13.94

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1.97ct Yellow Beryl, Oval, VVS

1.97ct Yellow Beryl, Oval, VVS

9.8 x 7.6 mm

$ 39.24

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4.63ct Multicolor Opal, Oval, Translucent

4.63ct Multicolor Opal, Oval, Translucent

17.4 x 8.9 mm

$ 102.28

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5.42ct Green Jadeite, Oval, Opaque

5.42ct Green Jadeite, Oval, Opaque

12 x 10 mm (calibrated)

$ 34.10

View Gem
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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

Very good

Posted By Niska in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It's mostly good, only some item's are easier to find through the search than the menu

Posted By Wayne in July, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I have been very happy with my prior purchases and enjoy the website experience.

Posted By Trouble in November, 2025
Source: Bizrate
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